SN74HC158N

Overview

The SN74HC158N is a quad 2-line to 1-line data selector/multiplexer in the HC logic family. It features inverted outputs and a separate strobe input for data selection control. The device operates within a supply voltage range of 2 V to 6 V and supports an operating temperature range from -40°C to +85°C. Electrical characteristics include a maximum propagation delay of 32 ns at 5 V, typical low power consumption with a maximum ICC of 80 µA, and output drive capabilities up to ±6 mA at 5 V.

Feature Summary

• Contains four independent multiplexers that select between two data sources based on a common select line.
• Provides inverted data outputs routed through internal inverters and drivers.
• Includes a dedicated strobe input to enable or disable data selection functionality.

Applications

• Routing digital signals from multiple sources to a single destination
• Implementing parallel-to-serial data conversion circuits
• Building address decoding logic in microprocessor systems

Procurement Notes

Verify the active production status of the SN74HC158N package variant before ordering, as availability may vary by region. Confirm RoHS compliance and lead finish specifications against current project requirements. Ensure the selected distributor provides traceable documentation matching the Texas Instruments datasheet SCLS296D.

Selection Notes

Select this component when a quad multiplexer with inverted outputs is required for standard CMOS logic applications. Verify that the system voltage falls within the 2 V to 6 V operational range. Consider the 32 ns maximum propagation delay for timing constraints. Ensure unused inputs are tied to VCC or GND to prevent floating states.

Part Context

This part belongs to the SN74HC158 series of data selectors manufactured by Texas Instruments. It is functionally compatible with other industry-standard quad 2-input multiplexers but offers specific HC family electrical characteristics. The PDIP-16 package provides through-hole mounting options suitable for prototyping and general-purpose circuit boards.

Replacement Considerations

SN74HC158DR (SOIC package)

FAQ

What is the logic state of the outputs?

The SN74HC158N provides inverted data outputs, meaning the selected input signal is logically complemented at the output pins.

How does the strobe input affect operation?

The strobe input acts as an enable/disable control. When activated, it allows the selected data to pass to the outputs; otherwise, the outputs remain in a high-impedance or inactive state depending on the specific logic level applied.